date! ,

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 20.9 26.3 37.8 53.0 66.7 74.8 79.8 76.5 66.6 55.0 38.5 24.5 51.7
Highest Mean Max. Temperature (F) 32.0 37.9 46.2 64.0 78.0 80.7 84.6 82.3 71.3 67.7 46.8 31.6 56.6
Year Highest Occurred 1990 1987 1987 1987 1977 1987 1966 1969 1987 1963 1975 1979 1987
Lowest Mean Max. Temperature (F) 9.6 18.7 29.6 46.5 57.8 65.8 74.6 72.1 60.3 48.3 32.4 15.0 48.7
Year Lowest Occurred 1963 1963 1965 1975 1973 1969 1971 1977 1965 1988 1985 1983 1972
Mean Temperature (F) 10.1 14.3 26.5 41.2 53.6 62.5 67.7 64.8 55.7 44.8 30.4 15.4 40.6
Highest Mean Temperature (F) 21.8 25.0 34.9 47.7 63.2 66.0 71.5 69.4 59.5 55.8 36.5 23.4 44.2
Year Highest Occurred 1990 1984 1973 1987 1977 1988 1966 1983 1978 1963 1975 1987 1987
Lowest Mean Temperature (F) 1.7 6.7 18.9 34.2 47.6 56.0 63.3 60.4 48.9 38.1 23.0 3.9 37.8
Year Lowest Occurred 1982 1963 1965 1975 1973 1969 1971 1977 1974 1987 1985 1983 1972
Mean Min. Temperature (F) -0.7 2.2 15.2 29.3 40.6 50.2 55.6 53.1 44.7 34.6 22.2 6.4 29.5
Highest Mean Min. Temperature (F) 11.6 17.0 25.2 34.6 48.3 54.4 59.6 58.1 48.4 43.8 28.3 17.6 31.8
Year Highest Occurred 1990 1983 1973 1986 1977 1971 1983 1988 1968 1963 1963 1965 1987
Lowest Mean Min. Temperature (F) -12.3 -6.2 7.3 21.8 34.9 44.3 51.5 48.6 36.8 27.4 13.5 -7.3 26.7
Year Lowest Occurred 1982 1974 1984 1975 1967 1982 1985 1977 1974 1987 1976 1983 1985
Mean Precipitation (in.) 1.07 0.78 1.46 2.36 3.20 3.80 3.44 4.34 4.25 2.56 1.88 1.42 30.56
Highest Precipitation (in.) 2.79 2.82 4.09 5.30 6.86 10.22 8.88 9.15 8.38 5.90 4.21 3.46 41.42
Year Highest Occurred 1969 1971 1973 1967 1973 1981 1986 1978 1970 1979 1975 1987 1990
Lowest Precipitation (in.) 0.14 0.10 0.15 0.65 0.56 1.70 0.63 0.69 0.40 0.43 0.27 0.39 16.89
Year Lowest Occurred 1985 1987 1978 1971 1986 1987 1989 1970 1976 1976 1981 1967 1989
Heating Degree Days (F) 1702. 1420. 1194. 714. 376. 122. 35. 80. 283. 626. 1038. 1538. 9128.
Cooling Degree Days (F) 0. 0. 0. 0. 22. 47. 119. 73. 0. 0. 0. 0. 261.
Western Regional Climate Center, wrcc@dri.edu